JPH11294690A - Segment type bearing device and vertical shaft drain pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment type bearing device which can maintain stable bearing performance for a long time even if drain machine space at which a vertical shaft drain pump is installed is flooded. SOLUTION: A segment type bearing device 25 has a sleeve 2 fixed to a pump main shaft 1, a bearing case 6 arranged on the outer periphery of the sleeve 2, a plurality of segment-shaped guide bearings 5 arranged circumferentially between the bearing case 6 and the sleeve 2, an oil tank 7 for storing lubricating liquid 11 for the sleeve 2 and sliding portions 5a of the guide bearings 5. In the device 25, an cylindrical container 3 for preventing the lubricating liquid 11 for the sleeve 2 and the sliding portions 5a of the guide bearings 5 from being replaced by rain water is provided in the oil tank 7. Thus, if rain water intrudes into the oil tank 7, the sliding portions 5a is always lubricated with the lubricating liquid 11 not to be broken. Because flow-out amount of the lubricating liquid 11 in the oil tank 7 can be reduced, only flow-out amount of the lubricating liquid 11 may be replenished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment type bearing device for supporting a main shaft of a large pump and a vertical shaft drainage pump using the segment type bearing device. It relates to a means for preventing the material from being pushed out and flowing out.

[0002]

2. Description of the Related Art Segment-type bearing devices for supporting a main shaft of a large pump are disposed at two places: an upper portion of a runner and a lower portion of a transmission. The segment type bearing device arranged in the lower portion of the transmission is configured by combining a guide bearing portion and a thrust bearing portion. Further, the segment type bearing device arranged above the runner is constituted only by the guide bearing portion.

[0003] The structure of a segment type bearing device composed of a combination of a guide bearing portion and a thrust bearing portion is described in, for example, Mechanical Drawings "Slide Bearing" published by the Japan Society of Mechanical Engineers, Showa
It is shown on pages 40 and 41 of the first edition of November 20, 1944.
The structure of the segment type bearing device constituted only by the guide bearing portion is shown on pages 48 and 49 of the above-mentioned mechanical drawings.

[0004] Usually, in this type of large pump, the bearing is
Since the lubrication is performed by the mineral oil-based turbine oil in the segment type bearing device, the drainage operation can be stably continued for a long time.

On the other hand, if the amount of rainfall is large due to rapid urbanization in recent years, the flow of rainwater into the drainage station tends to be large and sudden, and the drainage station may be flooded.
According to the legal regulations, it is required that the drainage can be operated continuously for three days even if the drainage pump station is flooded.

[0006]

In a segment type bearing device for supporting a main shaft of a large pump, a mineral oil-based turbine oil is used as a lubricating liquid. Turbine oil has a specific gravity of 0.87, which is smaller than the specific gravity of pumped liquid such as rainwater to be drained by a pump, which is 1.0.

Therefore, when the drainage pump station is actually flooded, mineral oil-based turbine oil having a specific gravity of 0.87 in the segment type bearing device flows out and is replaced by pumped liquid having a specific gravity of 1.0 such as rainwater. I will. As a result, damage to the segment type bearing device due to poor lubrication occurs, and drainage operation becomes impossible. That is, in the conventional segment type bearing device, if pumped liquid such as rainwater flows into the bearing portion, there is a possibility that the drainage operation cannot be continued for a long time.

An object of the present invention is to provide a segment type bearing device which can maintain stable bearing performance for a long time even if a drainage pump station is flooded.

Another object of the present invention is to provide a highly reliable vertical shaft drain pump using the segment type bearing device.

[0010]

In order to achieve the above object, the present invention provides a sleeve fixed to a rotating main shaft, a bearing case arranged on the outer periphery of the sleeve, and a sleeve between the bearing case and the sleeve. In a segment type bearing device having a plurality of segment-shaped guide bearings arranged along a direction and an oil tank for storing a lubricating liquid for a sliding portion of the sleeve and the guide bearing, the sleeve and the guide bearing slide in the oil tank. A segment type bearing device provided with means for preventing a lubricating fluid for a part from being replaced by rainwater is proposed.

[0011] The lubricating liquid replacement preventing means may be a cylindrical container attached downward to the outer periphery of the sleeve so as to surround the outer periphery of the guide bearing.

[0012] The lubricating liquid replacement preventing means may be a cylindrical container which is attached downward to the outer periphery of the sleeve so as to surround the outer periphery of the guide bearing, and whose ceiling is inclined downward as the distance from the rotating main shaft increases.

The lubricating liquid replacement preventing means may be constituted by a cylindrical container attached to the outer periphery of the sleeve so as to surround the outer periphery of the guide bearing, and a rectifying cup fixed so as to surround the outer periphery of the guide bearing and the bearing case. It is possible.

The lubricating liquid replacement preventing means may be formed of a cylindrical container attached to the outer periphery of the sleeve so as to surround the outer periphery of the guide bearing, and a rectifying plate fixed to the bearing case so as to surround the lower end surface of the guide bearing. it can.

According to another aspect of the present invention, there is provided a pump main shaft, a runner fixed to a lower end of the pump main shaft, a pump casing having a runner inserted therein to form a water flow passage therein, and a pump. A vertical shaft drainage pump having a segment type bearing device installed at a position above the casing and rotatably supporting the pump main shaft, wherein the vertical shaft drainage pump is any of the above segmental type bearing devices. suggest.

According to another aspect of the present invention, there is provided a thrust block fixed to a rotating spindle, a bearing case disposed at an outer peripheral position of the thrust block, and a circumferential portion between the bearing case and the thrust block. A plurality of segment-shaped guide bearings arranged along the direction, a collar attached to the lower part of the thrust block, a plurality of pad-type thrust bearings arranged opposite to the collar, and sliding of the guide bearing and the thrust bearing In a segment type bearing device having an oil tank for storing a lubricating liquid for a part, a lubricating liquid for a sliding part of a thrust block and a guide bearing and a lubricating liquid for a sliding part of a collar and a thrust bearing are provided in the oil tank. A segment type bearing device provided with means for preventing replacement by rainwater is proposed.

The lubricating liquid replacement preventing means includes a cylindrical container surrounding the outer peripheral portion of the guide bearing and fixed to the outer periphery of the thrust block, and an inner peripheral side cylindrical member surrounding the inner and outer periphery of the thrust bearing and fixed to the lower portion of the thrust block. It can be a member and an outer cylindrical member.

The lubricating liquid replacement preventing means includes a cylindrical container surrounding the outer peripheral portion of the guide bearing and attached to the outer periphery of the thrust block, and an inner peripheral side cylindrical member surrounding the inner and outer periphery of the thrust bearing and fixed to a lower portion of the thrust block. Alternatively, the outer cylindrical member may be inclined inward toward the lower side.

The lubricating liquid replacement preventing means surrounds the outer periphery of the guide bearing and is attached to the outer periphery of the thrust block. It is also possible to use an inner cylindrical member and an outer cylindrical member having a flange.

The lubricating liquid replacement prevention means includes a cylindrical container surrounding the outer peripheral portion of the guide bearing and attached to the outer periphery of the thrust block, an inner peripheral side tubular member surrounding the inner and outer periphery of the thrust bearing and fixed to the lower portion of the thrust block. A passage formed in the outer peripheral cylindrical member and a bearing casing at the bottom of the oil tank can also be used.

The lubricating liquid replacement preventing means includes a cylindrical container surrounding the outer periphery of the guide bearing and attached to the outer periphery of the thrust block, and an inner peripheral cylindrical member surrounding the inner and outer periphery of the thrust bearing and fixed to a lower portion of the thrust block. Alternatively, the outer cylindrical member may be formed by narrowing the lower end inward.

The lubricating liquid replacement preventing means includes a cylindrical container surrounding the outer periphery of the guide bearing and attached to the outer periphery of the thrust block, and an inner peripheral side cylindrical member surrounding the inner and outer periphery of the thrust bearing and fixed to a lower portion of the thrust block. It is also possible to use an outer cylindrical member and a straightening plate provided below the thrust bearing.

According to another aspect of the present invention, there is provided a pump main shaft, a blade fixed to a lower portion of the pump main shaft, a pump main shaft, and a water flow passage formed therein. In a pump having a pump casing and a segment-type bearing device mounted above the pump casing and rotatably supporting the pump main shaft,
A vertical shaft drainage pump is proposed in which the segment type bearing device is any of the above segment type bearing devices.

In order to achieve the above-mentioned object, the present invention further comprises a combination of any one of the above segment type bearing devices constituted only by the guide bearing portion, and a guide bearing portion and a thrust bearing portion. A vertical shaft drain pump provided with any of the above-described segment type bearing devices is proposed.

In the segment type bearing device of the present invention, since means for preventing the lubricating fluid in the bearing sliding portion from being replaced by rainwater is provided in the oil tank, pumped liquid such as rainwater enters the oil tank. Even so, the bearing sliding portion is always lubricated with the lubricating liquid, so that damage is reliably avoided. In addition, the amount of the lubricating liquid flowing in the oil tank can be reduced, which is effective in preventing environmental pollution. Further, it is possible to prevent damage to the sliding portion of the bearing due to foreign matter and the like, and at the time of maintenance after flooding, it is sufficient to replace only the lubricating liquid, thereby saving costs. As a result, even if the pump is flooded and pumped liquid such as rainwater enters the oil tank, stable bearing performance can be maintained for a long time.

Therefore, when the segment type bearing device capable of maintaining the stable bearing performance as described above is applied to the vertical shaft drain pump, a highly reliable vertical shaft drain pump can be obtained.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS << Embodiment of Vertical Drain Pump >> FIG.
1 is a longitudinal sectional view showing the structure of an example of a vertical shaft drainage pump to which the segment type bearing device according to the present invention is applied. In FIG. 11, the vertical shaft drain pump comprises a pump main shaft 1, a runner 22 fixed to a lower end of the pump main shaft 1, a runner 2
2 is provided with a pump casing 23 having a water flow path formed therein, and segment-type bearing devices 25 and 26 installed at a position above the pump casing 23 and rotatably supporting the pump main shaft 1. .

The present invention mainly relates to a segment type bearing device 2.
5, 26. In the example of FIG. 11, the segment type bearing devices 25 and 26 are installed near the upper surface 24 of the pump casing. However, only the segment type bearing device 26 may be installed near the upper end of the pump main shaft 1. The segment type bearing devices 25 and 26 may be installed near the upper end of the pump main shaft 1 in some cases. In any case, the present invention is effective as long as the segment type bearing devices 25 and 26 are likely to be submerged.

In the present invention, rainwater flows from the upper surface 24 of the pump casing 23 to the segment type bearing devices 25, 26.
As described later in detail, a means is provided for preventing the lubricating fluid of the sliding portion of the guide bearing and / or the thrust bearing sliding portion from being replaced by pumped liquid such as rainwater. The sliding portion of the guide bearing and / or the sliding portion of the thrust bearing are constantly immersed in the lubricating liquid, and can maintain stable bearing performance. As a result, the vertical shaft drain pump provided with the segment type bearing device of the present invention has high reliability.

Next, an embodiment of the segment type bearing device 25 and the segment type bearing device 26 according to the present invention will be described in more detail with reference to FIGS.

<< Embodiment 1 of Segment Type Bearing Device >> FIG.
1 is a longitudinal sectional view showing a structure of a first embodiment of a segment type bearing device according to the present invention. Segment type bearing device 25
Is arranged above the runner 22 and supports the pump main shaft 1, as shown in FIG.

The segment type bearing device 25 includes a sleeve 2 fixed to the pump main shaft 1, a bearing case 6 disposed at an outer peripheral position of the sleeve 2, and a plurality of the bearing cases 6 and 2 along the circumferential direction between the bearing case 6 and the sleeve 2. A segment-shaped guide bearing 5 to be arranged, an oil tank 7 for storing a lubricating liquid 11 for the guide bearing 5, and a bearing casing 8 extending upward from the oil tank 7.
And means for preventing the lubricating liquid 11 of the guide bearing sliding portion 5a from being replaced by rainwater in the oil tank 7.

The lubricating liquid replacement preventing means of the first embodiment is a cylindrical container 3 which covers at least the upper parts of the guide bearing 5 and the bearing case 6 and is fixed to the sleeve 2 so as to surround the outer periphery of the bearing case 6. The cylindrical container 3 includes a ceiling part A covering the upper parts of the guide bearing 5 and the bearing case 6, and a cylindrical part B surrounding the outer peripheral part of the bearing case 6. In the first embodiment, the structure in which the back surface of the guide bearing 5 is supported by the adjustment bolt 9 is employed. However, a structure in which the guide bearing 5 is directly fixed to the bearing case 6 without using the adjustment bolt 9 may be employed. The structure is not particularly limited.

When the guide bearing 5 is installed, a predetermined amount of mineral oil-based turbine oil is injected into the oil tank 7 as a lubricating liquid 11. To reliably remove the air remaining inside the cylindrical container 3, the guide portion closing plug 4 is removed, and turbine oil is injected. After the turbine oil is injected and it is confirmed that the air inside the cylindrical container 3 has escaped, the guide portion closing plug 4 is attached.

In the segment type bearing device of the first embodiment having such a structure, when the drainage station is flooded, rainwater flows through the gap between the oil tank 7 and the pump main shaft 1 as shown by an arrow in FIG. It invades inside 7. After that, oil tank 7
While pushing out the lubricating liquid 11, reaches the gap formed by the bearing casing 8 and the outer peripheral portion of the cylindrical portion B of the cylindrical container 3, and flows out of the segment type bearing device 25.

At this time, the lubricating liquid 11
Is smaller in specific gravity than water such as a river, and remains in a gap surrounded by the outer peripheral portion of the sleeve 2 and the cylindrical container 3. During the rotation of the pump main shaft 1, the speed component in the circumferential direction is large, and almost no upward flow component is generated. Therefore, since rainwater does not flow into the gap surrounded by the outer peripheral portion of the sleeve 2 and the cylindrical container 3, the lubricating liquid 11 is not washed by the rainwater.

For this reason, the bearing 5 is always immersed in the lubricating liquid 11, and the continuous operation can be continued for a long time. Further, since the amount of the lubricating liquid 11 remaining in the gap surrounded by the outer peripheral portion of the sleeve 2 and the cylindrical container 3 is large, the amount of the lubricating liquid 11 flowing to the outside of the segment type bearing device 25 is reduced, and the contamination by the flooding is reduced. Can also be reduced. Since rainwater does not flow into a gap surrounded by the outer peripheral portion of the sleeve 2 and the cylindrical container 3, there is no damage to the bearing portion due to foreign substances contained in the rainwater. Therefore, at the time of re-installation after flooding,
The bearing 5 and the sleeve 2 can continue to be used,
Only one replacement is required, and maintenance costs can be greatly reduced. Further, even in a submerged state, the lubricating liquid 11 is held in the bearing sliding portion 5a, and the pump can be started and stopped. Therefore, even if the pump of the main engine stops due to trouble of equipment other than the pump, restarting becomes easy,
High reliability can be achieved.

<< Second Embodiment of Segment Type Bearing Device >> FIG.
FIG. 4 is a longitudinal sectional view showing the structure of a second embodiment of the segment type bearing device according to the present invention. The difference between the second embodiment and the first embodiment is that the ceiling A of the cylindrical container 3 constituting the lubricating liquid replacement preventing means is inclined.

According to the second embodiment, the same effects as those of the first embodiment can be obtained, and the ceiling A is inclined.
When the lubricating liquid 11 is lubricated, the air in the cylindrical container collects on the inner peripheral side and is eliminated, so that the lubricating time can be reduced. Also, at the time of assembling, the position of the guide part closing plug 4 is
And the guide portion closing plug 4 can be easily attached and detached.

<< Embodiment 3 of Segment Type Bearing Device >> FIG.
FIG. 5 is a longitudinal sectional view showing a structure of a segment type bearing device according to a third embodiment of the present invention. The third embodiment differs from the first embodiment in that the lubricating liquid replacement preventing means is replaced by the cylindrical container 3 of the first embodiment.
And a rectifying cup 10 fixed so as to surround the guide bearing 5 and the bearing case 6 immediately outside.

According to the third embodiment, the same effects as those of the first embodiment can be obtained, and since the rectifying cup 10 is provided, the lubricating liquid 11 in the cylindrical container 3 is hardly agitated, and the lubricating liquid surface is wavy. Can be reduced.

<< Embodiment 4 of Segment Type Bearing Device >> FIG.
FIG. 7 is a longitudinal sectional view showing a structure of a fourth embodiment of the segment type bearing device according to the present invention. The fourth embodiment is different from the first embodiment in that the cylindrical container 3 of the first embodiment and the rectifying plate 10a fixed to the bearing case 6 so as to surround the lower end surface of the guide bearing 5 constitute a lubricating liquid replacement preventing means. It was done. In addition,
The upper surface of the inner peripheral portion of the current plate 10 a may be close enough to contact the lower end of the sleeve 2 and / or the lower end of the guide bearing 5.

According to the fourth embodiment, the same effects as those of the first embodiment can be obtained, and at the same time, the rectifying plate 10a makes it difficult for rainwater to enter the cylindrical container 3, and the reliability is further improved.

<< Embodiment 5 of Segment Type Bearing Device >> FIG.
FIG. 9 is a longitudinal sectional view showing a structure of a fifth embodiment of the segment type bearing device according to the present invention. The segment type bearing device 26 shown in FIG. 5 is disposed below the transmission 21 and supports the pump main shaft 1 as shown in FIG.

The segment type bearing device 26 includes a thrust block 17 fixed to the pump main shaft 1, a bearing case 6a disposed at an outer peripheral position of the thrust block 17, and a circumferential direction between the bearing case 6a and the thrust block 17. A plurality of segment-shaped guide bearings 5 arranged along
A collar 12 attached to a lower portion of the thrust block 17, a plurality of pad-type thrust bearings 16 arranged opposite to the collar 12, an oil tank 7a for storing a lubricating liquid 11 for the bearing, and a guide in the oil tank 7. Means for preventing the lubricating liquid 11 of the bearing sliding portion 5a and the thrust bearing sliding portion 16a from being replaced by rainwater.

The oil tank 7a is formed by an inner cylinder 7b fixed to a bearing casing 8a and an outer cylinder 7c. A cover 18 is fixed to an upper portion of the outer cylinder 7c. As in the first embodiment, a predetermined amount of mineral oil-based turbine oil is filled in the oil tank 7a as the lubricating liquid 11.

The lubricating liquid replacement preventing means of the fifth embodiment comprises a cylindrical container 3 which covers the upper portions of the guide bearing 5 and the bearing case 6 and surrounds the outer periphery of the bearing case 6 and is fixed to the outer periphery of the thrust block 17. An inner cylindrical member 14 and an outer cylindrical member 13 are fixed to the lower portion of the thrust block 17 so as to surround the inner and outer circumferences of the bearing 16.

When the guide bearing 5 and the thrust bearing 16 are assembled, a predetermined amount of mineral oil-based turbine oil is poured into the oil tank 7a as the lubricating liquid 11. In order to reliably remove air remaining inside the cylindrical container 3 and in the gap surrounded by the inner cylindrical member 14 and the outer cylindrical member 13 fixed to the lower part of the thrust block 17, the guide part closing plug 4 and the thrust Remove the part closing plug 15 and inject turbine oil.
It was confirmed that air in a gap surrounded by the inner cylindrical member 14 and the outer cylindrical member 13 fixed to the inside of the cylindrical container 3 and the lower portion of the thrust block 17 was released. The part closing plug 15 is attached.

In the segment type bearing device of Embodiment 5 configured as described above, when the drainage station is flooded, the rainwater
As shown by an arrow in FIG. 3, the fluid flows from a gap between the inner cylinder 7b forming the oil tank 7a and the pump main shaft 1 and enters the oil tank 7a. Thereafter, while pushing out the lubricating liquid 11 from the oil tank 7a, the lubricating liquid 11 reaches the gap formed by the bearing casing 8a and the lower surface of the pad-type thrust bearing 16, passes through the outer peripheral portion of the cylindrical container 3, and covers the cover 18 and the thrust block 17. From the segment bearing device to the outside of the segment bearing device.

At this time, the lubricating liquid 11
Has a lower specific gravity than river water, and the thrust block 17
In the gap surrounded by the outer peripheral portion of the cylindrical container 3 and the cylindrical container 3. Further, the lubricating liquid 11 is supplied to the thrust block 17.
Remains in the gap surrounded by the inner peripheral side cylindrical member 14 and the outer peripheral side cylindrical member 13 fixed to the lower part.

On the other hand, while the pump main shaft 1 is rotating, the speed component in the circumferential direction is large, and almost no upward flow component is generated. Therefore, rainwater does not flow into a gap surrounded by the outer peripheral portion of the thrust block 17 and the cylindrical container 3. In addition, a gap surrounded by the inner cylindrical member 14 fixed to the lower portion of the thrust block 17 and the outer cylindrical member 13 is also provided.
Rainwater does not flow. As a result, the lubricating liquid 11 remaining in these gaps is not washed by rainwater.

Therefore, the guide bearing sliding portion 5a and the thrust bearing sliding portion 16a are always immersed in the lubricating liquid 11, and continuous operation for a long time can be continued.

<< Sixth Embodiment of Segment Type Bearing Device >> FIG.
FIG. 9 is a longitudinal sectional view showing the structure of a sixth embodiment of the segment type bearing device according to the present invention. Embodiment 6 is different from Embodiment 5 in that the cylindrical container 3 attached to the outer periphery of the thrust block 17 so as to surround the outer periphery of the guide bearing 5, the inner peripheral side cylindrical member 14 fixed to the lower portion of the thrust block 17, and The lubricating liquid replacement preventing means is constituted by the outer peripheral side cylindrical member 13a which is inclined inward toward the lower side.

According to the sixth embodiment, the same effect as that of the fifth embodiment can be obtained, and the lubricating liquid 11 can be pushed in due to the difference in centrifugal force of the outer cylindrical member 13a inclined inward downward. , It is less likely to be replaced by rainwater.

<< Seventh Embodiment of Segment Type Bearing Device >> FIG.
FIG. 9 is a longitudinal sectional view showing a structure of a segment type bearing device according to a seventh embodiment of the present invention. The seventh embodiment differs from the fifth embodiment in that the cylindrical container 3 is attached to the outer periphery of the thrust block 17 so as to surround the outer periphery of the guide bearing 5, and the lower end of the thrust block 17 is fixed to the thrust bearing. The inner peripheral side cylindrical member 14a having the flange 19 and the outer peripheral side cylindrical member 13b constitute a lubricating liquid replacement preventing means.

According to the seventh embodiment, the same effect as that of the fifth embodiment can be obtained, and the inner cylindrical member 14a and the outer cylindrical member 13a fixed to the lower part of the thrust block 17 can be obtained.
By the flange 19 formed at the lower end of b, the gap with the thrust bearing 16 can be narrowed, which is effective for preventing rainwater from entering.

<< Eighth Embodiment of Segment Type Bearing Device >> FIG.
FIG. 9 is a longitudinal sectional view showing the structure of an eighth embodiment of the segment type bearing device according to the present invention. Embodiment 8 is different from Embodiment 5 in that the cylindrical container 3 attached to the outer periphery of the thrust block 17 so as to surround the outer periphery of the guide bearing 5, the inner peripheral side cylindrical member 14 fixed to the lower portion of the thrust block 17, and The outer peripheral side cylindrical member 13 and the passage 20 provided in the bearing casing 8a constitute lubricating liquid replacement prevention means.

According to the eighth embodiment, the same effects as those of the fifth embodiment can be obtained, and the passage 20 provided in the bearing casing 8a serves as a passage for rainwater, so that the thrust bearing 16 is more difficult for rainwater to enter.

<< Embodiment 9 of Segment Type Bearing Device >> FIG.
FIG. 14 is a longitudinal sectional view showing a structure of a ninth embodiment of a segment type bearing device according to the present invention. Embodiment 9 is different from Embodiment 5 in that the cylindrical container 3 attached to the outer periphery of the thrust block 17 so as to surround the outer periphery of the guide bearing 5, the inner peripheral side cylindrical member 14 fixed to the lower part of the thrust block 17, and The lubricating liquid replacement preventing means is constituted by the outer cylindrical member 13c having the lower end narrowed inward.

According to the ninth embodiment, the same effect as that of the fifth embodiment is obtained, and the lower end of the outer cylindrical member 13 is narrowed inward. Works, making it difficult for the lubricating liquid 11 to come out, and the reliability is further improved.

<< Embodiment 10 of the Segment Type Bearing Device >> FIG. 10 shows Embodiment 1 of the segment type bearing device according to the present invention.
FIG. 2 is a longitudinal sectional view showing a structure of a zero. Example 10 is Example 5
The difference is that the cylindrical container 3 attached to the outer periphery of the thrust block 17 so as to surround the outer periphery of the guide bearing 5 and the inner peripheral side cylindrical member 14 fixed to the lower portion of the thrust block 17
And the outer cylindrical member 13 and the thrust bearing 16
And the rectifying plate 10b provided at the lower part of the above-mentioned structure constitutes a means for preventing the replacement of the lubricating liquid.

According to the tenth embodiment, the same effect as that of the fifth embodiment can be obtained, and the rectifying plate 10b provided below the thrust bearing 16, the inner peripheral side cylindrical member 14, and the outer peripheral side cylindrical member 13, Can be narrowed, and it is difficult for rainwater to enter.

[0063]

In the segment type bearing device of the present invention, since the lubricating liquid replacement preventing means for preventing the lubricating liquid in the bearing sliding portion from being pushed out by rainwater and flowing out is provided in the oil tank, the oil tank is provided. Even if rainwater enters inside, the sliding portion of the bearing is always lubricated with the lubricating liquid, so that damage can be reliably prevented. In addition, the amount of the lubricating liquid flowing out of the oil tank can be reduced, which is effective in preventing environmental pollution. Furthermore, damage to the sliding portion of the bearing due to foreign matter can be prevented, and during maintenance after flooding, only the lubricating fluid needs to be replaced, so that maintenance costs can be reduced. As a result, even if rainwater enters the oil tank due to flooding, stable bearing performance can be maintained for a long period of time. ★ If a segment type bearing device that can maintain such stable bearing performance is applied to a vertical shaft drain pump, a highly reliable vertical shaft drain pump can be obtained.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 2 is a second embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 3 is a third embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 4 is a fourth embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 5 is a fifth embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 6 shows a sixth embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 7 shows a seventh embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 8 shows an eighth embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 9 shows a ninth embodiment of the segment type bearing device according to the present invention.
It is a longitudinal cross-sectional view which shows the structure of.

FIG. 10 is a longitudinal sectional view showing a structure of a tenth embodiment of a segment type bearing device according to the present invention.

FIG. 11 is a longitudinal sectional view showing the structure of an example of a vertical shaft drainage pump to which the segment type bearing device according to the present invention is applied.

[Explanation of symbols]

 Reference Signs List A ceiling part B cylinder part 1 pump main shaft 2 sleeve 3 cylindrical container 4 guide part closing plug 5 guide bearing 5a guide bearing sliding part 6 bearing case 7 oil tank 7a oil tank 8 bearing casing 8a bearing casing 9 adjusting bolt 10 rectifying cup 10a rectifying plate 10b Straightening plate 11 Lubricating liquid 12 Collar 13 Outer cylindrical member 13a Outer cylindrical member 13b Outer cylindrical member 13c Outer cylindrical member 14 Inner cylindrical member 14a Inner cylindrical member 15 Thrust closing Plug 16 Thrust bearing 16a Thrust bearing sliding portion 17 Thrust block 18 Cover 19 Projection 20 Passage 21 Transmission 22 Runner 23 Pump casing 24 Upper surface of pump casing 25 Segment type bearing device 26 Segment type bearing device

Continued on the front page (72) Inventor Shigenobu Nagasawa 603, Kandamachi, Tsuchiura-shi, Ibaraki Pref.

Claims (15)

[Claims] 1. A sleeve fixed to a rotating main shaft, a bearing case arranged on an outer periphery of the sleeve, and a plurality of segment-shaped guide bearings arranged along the circumferential direction between the bearing case and the sleeve. And a oil tank for storing a lubricating liquid for the sliding portion of the sleeve and the guide bearing, wherein the lubricating liquid for the sliding portion of the sleeve and the guide bearing is rainwater in the oil tank. A segment type bearing device provided with a means for preventing replacement by a bearing. 2. The segment type bearing device according to claim 1, wherein said lubricating liquid replacement preventing means is a cylindrical container attached downward to an outer periphery of a sleeve so as to surround an outer periphery of the guide bearing. Type bearing device. 3. The segment type bearing device according to claim 1, wherein the lubricating liquid replacement preventing means is attached to an outer periphery of a sleeve so as to surround an outer periphery of the guide bearing, and the lubricating liquid lowering means is moved downward from the ceiling as the distance from the rotating main shaft is increased. A segment type bearing device characterized in that it is a cylindrical container which is inclined at an angle. 4. The segment type bearing device according to claim 1, wherein said lubricating liquid replacement preventing means includes: a cylindrical container attached to an outer periphery of a sleeve so as to surround an outer periphery of the guide bearing; A rectifying cup fixed so as to surround the outside immediately. 5. The segment type bearing device according to claim 1, wherein the lubricating liquid replacement preventing unit surrounds a cylindrical container attached to an outer periphery of a sleeve so as to surround an outer periphery of the guide bearing, and surrounds a lower end surface of the guide bearing. And a flow straightening plate fixed to the bearing case. 6. A thrust block fixed to a rotating main shaft, a bearing case arranged at an outer peripheral position of the thrust block, and a plurality of segment-shaped members arranged along the circumferential direction between the bearing case and the thrust block. A guide bearing, a collar attached to a lower portion of the thrust block, a plurality of pad-type thrust bearings disposed opposite to the collar, and a lubricating fluid for sliding portions of the guide bearing and the thrust bearing. A lubricating fluid for a sliding portion of the thrust block and the guide bearing and a lubricating fluid for a sliding portion of the collar and the thrust bearing in the oil reservoir. A segment type bearing device provided with a means for preventing replacement by a bearing. 7. The segment type bearing device according to claim 6, wherein the lubricating liquid replacement preventing means surrounds an outer peripheral portion of the guide bearing and is fixed to an outer periphery of the thrust block. A segment type bearing device comprising an inner peripheral side cylindrical member and an outer peripheral side cylindrical member which surround the inner and outer circumferences and are fixed to a lower portion of the thrust block. 8. The segment type bearing device according to claim 6, wherein the lubricating liquid replacement preventing unit surrounds an outer peripheral portion of the guide bearing and is attached to an outer periphery of the thrust block, and inside and outside of the thrust bearing. A segment type bearing device comprising an inner peripheral side cylindrical member surrounding the periphery and fixed to a lower portion of the thrust block, and an outer peripheral side cylindrical member inclined inward downwardly. 9. The segment type bearing device according to claim 6, wherein the lubricating liquid replacement preventing means surrounds an outer peripheral portion of the guide bearing and is attached to an outer periphery of the thrust block. A segment type bearing device comprising an inner cylindrical member and an outer cylindrical member having a flange surrounding the periphery and fixed to a lower portion of the thrust block and having a flange at a lower end facing the thrust bearing. 10. The segment type bearing device according to claim 6, wherein said lubricant replacement preventing means surrounds an outer peripheral portion of said guide bearing and is attached to an outer periphery of said thrust block. A segment-type bearing device comprising: an inner peripheral side cylindrical member and an outer peripheral side cylindrical member which are fixed to a lower portion of the thrust block and surround a periphery; and a passage formed in a bearing casing which is a bottom of the oil tank. 11. The segment type bearing device according to claim 6, wherein said lubricant replacement preventing means surrounds an outer peripheral portion of said guide bearing and is attached to an outer periphery of said thrust block. A segment-type bearing device comprising an inner cylindrical member surrounding the periphery and fixed to a lower portion of the thrust block, and an outer cylindrical member having a lower end narrowed inward. 12. The segment type bearing device according to claim 6, wherein the lubricating liquid replacement preventing means surrounds an outer peripheral portion of the guide bearing and is attached to an outer periphery of the thrust block. A segment type bearing device, comprising: an inner peripheral side cylindrical member and an outer peripheral side cylindrical member surrounding the periphery and fixed to a lower portion of the thrust block; and a rectifying plate provided at a lower portion of the thrust bearing. 13. A pump main shaft, a runner fixed to a lower end of the pump main shaft, a pump casing into which the runner is inserted to form a water flow passage therein, and a pump casing installed at a position higher than the pump casing. 6. A vertical shaft drain pump having a segment type bearing device rotatably supporting the pump main shaft, wherein the segment type bearing device is provided.
A vertical shaft drainage pump characterized by being the segment type bearing device according to any one of the above. 14. A pump main shaft, a blade fixed to a lower portion of the pump main shaft, and a pump main shaft inserted therethrough.
A pump comprising: a pump casing having a water flow path formed therein; and a segment-type bearing device mounted above the pump casing and rotatably supporting a pump main shaft. Claim 6 to Claim 1
3. A vertical shaft drainage pump, which is the segment type bearing device according to any one of 2. 15. A pump main shaft, a blade fixed to a lower portion of the pump main shaft, and a pump main shaft inserted therethrough.
A pump comprising: a pump casing having a water flow path formed therein; and a segment-type bearing device mounted above the pump casing and rotatably supporting a pump main shaft. Claims 1 to 5
A vertical shaft drainage pump comprising: the segment type bearing device according to any one of claims 1 to 4; and the segment type bearing device according to any one of claims 6 to 12.